參數(shù)資料
型號: KS0125
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: Multi-standard Video Encoder(多標(biāo)準(zhǔn)視頻編碼器)
中文描述: 多標(biāo)準(zhǔn)視頻編碼器(多標(biāo)準(zhǔn)視頻編碼器)
文件頁數(shù): 19/36頁
文件大?。?/td> 561K
代理商: KS0125
MULTIMEDIA VIDEO
KS0125
PAGE 19 OF 36
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OSD Font ROM
The OSD Font ROM contains a total of 250 characters. These character addresses are continuously incremented
from 0 to 250 in decimal, (or 000 to 0F9 in hexadecimal).
Addressing The OSD Font Rom By The OSD RAM Data
The OSD RAM data is used as the character pointer to select a particular character from the OSD font ROM. Each
character in the OSD Font ROM is designated to fit within a 10 x 12 dot matrix. The pointer only points to the top left
corner bit of each character matrix. When a character is selected by the OSD RAM data during a display scan, the
OSD ROM control circuitry will automatically generate all necessary addresses to go through all bit locations of the
10 x12 character matrix. Table 26 shows the contents of the OSD Font ROM,along with their address locations.
OSD Character Boundary
During the on screen display,the Boundary Location Generator generates a boundary to surround a character. The
actual character size is 12 x 14 dot matrix. With the boundary surrounding a character, the character size becomes
a 14 x 16 dot matrix.
Valid Time to Access the OSD RAM
There are two way to access the OSD RAM. One of them is using it when VFIG bit 7 is high. The other is using
INT(pin # 78), as follows.
Table 3. OSD RAM Address Description
OSD RAM Address
(HEXADECIMAL)
Character Location On Screen
000
018
On-Screen line1, character 0 to character 24
020
038
On-Screen line2, character 0 to character 24
040
058
On-Screen line3, character 0 to character 24
060
078
On-Screen line4, character 0 to character 24
080
098
On-Screen line5, character 0 to character 24
0A0
0B8
On-Screen line6, character 0 to character 24
0C0
0D8
On-Screen line7, character 0 to character 24
0E0
0F8
On-Screen line8, character 0 to character 24
100
118
On-Screen line9, character 0 to character 24
120
138
On-Screen line10, character 0 to character 24
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